单项选择题

Physics is the present-day equivalent of ______ used to be called natural philosophy, from which most of present day science arose.

A. that
B. all
C. which
D. what
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单项选择题
It is only when you nearly lose someone ______ fully conscious of how much you value him.
A. do you become
B. then you become
C. that you become
D. have you become
单项选择题
I bought an alarm clock with a(n) ______ dial, which can be seen clearly in the dark.
A. supersonic
B. luminous
C. audible
D. amplified
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